This non-implication,
Form 0 \( \not \Rightarrow \)
Form 31,
whose code is 4, is constructed around a proven non-implication as follows:
| Hypothesis | Statement |
|---|---|
| Form 0 | \(0 = 0\). |
| Conclusion | Statement |
|---|---|
| Form 209 | <p> There is an ordinal \(\alpha\) such that for all \(X\), if \(X\) is a denumerable union of denumerable sets then \({\cal P}(X)\) cannot be partitioned into \(\aleph_{\alpha}\) non-empty sets. </p> |
The conclusion Form 0 \( \not \Rightarrow \) Form 31 then follows.
Finally, the
List of models where hypothesis is true and the conclusion is false:
| Name | Statement |
|---|---|
| \(\cal M28\) Morris' Model II | Morris constructs a generic extension of acountable standard model of ZFC in which there is a proper class ofgeneric sets |